Actually, yes you did.
The idea is, first and foremost, to shake up the two major parties. If anyone is unhappy about the direction of this country - and it has been complicity done from both sides of the aisle - the very first thing one should want to do is shake up the parties. Make them afraid of the people, that some are starting to realize you can vote a different way.
!@#$ what the general public notices, its about what the politicians notice.
The way to make someone change is to take a chunk of something away from them that they need. The big problem with our system is that it has devolved to the point that the electorate needs to be the ultimate check of power, something which hasn't happened before. The easiest way to do this is to take votes away from the two major parties, and give them to a third party.
One of two things will ultimately happen:
1.) (Most likely) - Both parties shift and reform a bit, fighting for those votes, as they make a difference in close elections.
2.) (Less likely) - A third party becomes a legitimate threat, causing a realignment in political parties to bring it back down to two.
There is no "philosophy" involved here. The Democrats and Republicans will do what they feel best wins them elections. Identifying with one party and voting for the "lesser of two evils" is an action which enables their actions to continue without consequences.